| 摘要 |
<p>A turbine blade (100) includes a first side wall (304) including a first tip edge (312), a second side wall (306) opposite the first side wall (304) and including a second tip edge (314), a tip wall (308) between the first and second side walls (304, 306), the tip wall (308) recessed from the first tip edge (312) of the first side wall (304) and the second tip edge (314) of the second side wall (306) forming a coolant cavity (316), a tip recess cavity, a first parapet wall (320) on the first side wall (304), and a second parapet wall (322) on the second side wall (306), the coolant cavity (316) defined by the tip wall (308), and the tip recess cavity (128) defined by the tip wall (308), and the first and second parapet wall (320, 322), a step (330) formed between the first tip edge (312) and the tip wall (308), a cooling hole (334) through the first parapet wall (320), the step (330), and the tip wall (308), the cooling hole (334) including an open and a closed channel section (366).</p> |
